HP HP-80, Owner'S Handbook Manual

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Page 3: ...nal prob lem solving More than 20 000 HP programmable calculators and digital computers are at work in a wide range of applications in science industry education medicine and business Their effec tiveness is further enhanced by a complete line of accessory de vices ranging from digital tape and disc drives to card and tape readers printers and plotters Now we ve coupled our experience in scientifi...

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Page 5: ...l Operat ing Instructions Then go back to the Table of Contents look up the application you want to use turn to the applicable pages and do the sample problems on your HP 80 according to the step by step instructions It isn t necessary to read anything else We included some design philosophy in the back of your handbook because we know that some users are crazy about details Also it gives us a cha...

Page 6: ...aring Data 15 Performing Simple Arithmetic 15 Manipulating Data 16 Reviewing Verifying Data Entered 16 Reversing Operand Order 17 Recalling a Constant Value from Storage 17 Basic Functions 17 Calculating Square Root 17 Calculating Percentage Problems 18 Raising a Number to a Power Exponentiation 19 Calculating Time Intervals 20 Calculating Future or Past Dates 20 Determining Day of the Week 21 Spe...

Page 7: ...s Annual Percentage Rate 01 Interest on Installment Loans 39 Add on Interest to Annual Percentage Rate Conversion 39 Accrued Interest 40 Discounted Note 41 Accumulated Interest Between Two Points Remaining Principal 42 Rebates on Consumer Loans Rule of 78 s 43 Merchandising Purchasing Cost and Price Markup Chain Discounts 44 Cash Discounts 45 Statistical Analysis Mean Standard Deviation 46 Linear ...

Page 8: ...a S 1 jl i f 0 U J 8 q 7 1 4 ii ftY It l l U 11 t g 1 1 J l f 80 ...

Page 9: ...x financial and business calculations and makes them more accurate too The tool is the HP 80 electronic answer ma chine that weighs only nine ounces you can take it anywhere you go and should and replaces stacks of tricky tables and other such inundata It is the first pocket calculator to offer built in logic for solving business oriented problems There is no compa rable tool available today To gi...

Page 10: ...90 There fore the exact annual rate of return is some whe re between 5 and 6 Now for interpolation note that since method used is linear interpolation the answer is only approximate Let X amount between actual and low value 01 or 1 difference between two table values 0928995773 difference between lower table amount of 1 4071004227 and actual of 1 50 0965298363 difference between higher and lower t...

Page 11: ...turity calculations Time interval future date calculations Linear regression analysis trend line forecasting applications Square root calculations In addition to its more exotic features the HP 80 is fast accurate and convenient to use It handles numbers as small as 10 09 that s a decimal point followed by 98 zeros and a 1 and numbers as large as 1000 1 followed by 99 zeros automatically places th...

Page 12: ...ver this happens clear the display by pressing CLX _ appears on the display and a new problem may be entered Keyboard Description Figure 1 illustrates the keyboard layout and classifies the keys ac cording to type and function Although most of the keys will be familiar to you some require further explanation because of the unique features of the HP 80 Number Entry Keys through EJ Number Control Ke...

Page 13: ...Dual Function Control Key Figure 1 Keyboard Layout 11 Keys Standard Extended Function Key ...

Page 14: ...nstants Page IS Arithmetic Function Keys x Dual Function Control Key Gold Key The unlabeled gold key extends or expands the use of those func tion keys having gold lettered notations above them It is used also to clear the machine when used in conjunction with the CLX key and to round numbers to various decimal places when used with number entry keys To use the alternate function the one on top me...

Page 15: ...m using an exponent of lOin the last two digits displayed Entering Negative Numbers To enter a negative number press CHS change sign key after entering a positive number The number will appear on the display preceded by a minus sign To change the sign of a negative or positive num ber on the display press CHS Rounding Numbers A secondary function of all numeral keys is the rounding of displayed nu...

Page 16: ... easy to say add several numbers store the result and then divide the individual numbers by the stored sum without having to reenter this constant value for each iteration The storage location is changed by writing over it with a new constant value or may be cleared by turning the power switch off then on A number stored with STO is not affected by computations or by data stored in other locations...

Page 17: ...ere are however certain applications that require clearing the calculator before performing the calculation They are Discounted Cash Flow Analysis Mean Standard Deviation Linear Regression Trend Line Analysis Performing Simple Arithmetic In the HP 80 arithmetic answers appear immediately after pressing anyone of the arithmetic keys x For example add 12 and 3 Enter 12 SAVE 3 See Displayed Did you n...

Page 18: ...tant CLEAR value CHS changes the sign of a displayed number CLX clears data The remaining three keys R x y RC are used to control the lo cation of data after it has been loaded or stored in the case of STO Through the ability to manipulate the location of data you are able to view the contents can see intermediate results to problems and have greater operating flexibility Reviewing Verifying Data ...

Page 19: ...tant value into the display for use as an operand in repetitive calculation RCL must be pressed each time the constant is to be used Whatever was previously displayed in the machine is automatically saved loaded when you press RCL so you are now ready to press any desired arithmetic function key such as X For example add 8 20 17 43 store the result and divide the individual numbers by the stored s...

Page 20: ...se you don t have to convert percenls to their decimal equivalents before using them just press the II key after keying in the percent value Three types of percentage problems are handled Finding percentage of number base x rate Finding net amount base or percentage Finding percent difference between a number and the base number base base Finding Percentage To find the percentage of a number enter...

Page 21: ...ically In many calculators you d have to perform the serial calcula tion multiplying the base number a number of times equal to the ex ponent if you could do it at allJ That is 8 x 8 x 8 x 8 x 8 x 8 means 86 To make it easier we have you enter the base number press SAVE enter the value of the power to which the base number is to be raised press III and the result is displayed For example to find t...

Page 22: ... 11 092009 Thus to find the number of days between two dates simply key in the first date and press SAV E key in the second date and press 1iII The answer shown in days is ready for other operations or input to another problem For example to find the exact number of days between De cember 10 1974 and March 14 1976 Enter See Displayed 12 101974 SAVE 3 141976 1iII _ number of days Calculating Future...

Page 23: ...ast dates can be determined as follows 1 Enter known date press SAVE 2 Enter today s date press SAVE 3 Enter 7 press 4 Enter displayed number omit decimal portion press 5 Enter 7 press x to get day factor If the known date is in the future count forward from today by the day factor For example if today is Monday and the day factor is 6 the future day would be Sunday If the known date is in the pas...

Page 24: ...s use keys from both the financial and interactive classifications as well as keys from the basic classification For example discounted cash flow analysis and accumulated interest problems use both financial and interactive keys Financial Functions Financial functions are used primarily in investment and loan applica tions simple interest compound interest annuities and bond prob lems These proble...

Page 25: ...uent calculations To do so just press STO before but not after th is is an illegal operation pressing the associated financial key then proceed with your current financial calculation and recall the stored value as needed by pressing RC Interactive Functions The interactive functions and associated keys are used primarily in applications concerned with constructing and dynamically modifying schedu...

Page 26: ...keystroke or errors will result Sum ot Digits Calculations The sum of the digits key Ell is used to calculate an amortization schedule and related balances for consumer finance charges or depre ciation of capital assets Amortization on a period by period basis as well as the remaining balance after any given period can be obtained Furthermore you have the option of finding this information at any ...

Page 27: ...pressing Then proceed with the calculation Compounded Amounts Future Value of Compounded Amount This calculation finds the future value of an amount compounded at a certain interest rate over a specified number of periods Information is entered as follows CD Enter number of time periods press al Enter rate per period press o Enter principal present value press m o Press iiito obtain the future val...

Page 28: ... you wanted to establish a fund of 15 000 for an ex tended vacation which you planned to take in 2 years what would be the investment required now if money is worth 4 compounded quarterly Solution Enter See Displayed 2 SAVE 4 X 1iI i number of periods quarters in 2 years 4 SAVE 4 i interest rate per quarter 150001111 principal present value to be invested Rate ot Interest tor Compounded Amount Thi...

Page 29: ...m at a specified rate on a given investment Information is entered as follows Q Enter rate per period press o Enter present value press II Enter future value press o Press to obtain number of periods If desired enter number of periods per year press to convert periods to years Sample Case You now have 887 in a savings account in your bank which is paying 5 4 compounded monthly How long will it tak...

Page 30: ... finds the effective annual interest rate when the number of periods per year and the nominal stated annual interest rate are known Information is entered as follows CD Enter number of periods per year press STO Enter nominal rate press RCL Enter 100 press STO 11111 o Press RCL to obtain effective annual rate Sample Case What is the effective annual rate of interest if the nominal annual rate of 1...

Page 31: ... follows CD Enter number of periods press g o Enter interest rate per period press Enter amount of periodic payment press III G Press to obtain future value Sample Case How much money will you have at the end of 5 years if you deposit 250 per month in a savings account at 6 interest compounded monthly Solution Enter 12 SAVE 5 X g_ See Displayed 1 11 number of periods months in 5 years 6 SAV E 12 1...

Page 32: ...erest rate per period are known Enter information as follows CD Enter number of periods press iii Enter interest rate per period press a Enter future value press iii 1 Press IIIto obtain amount of periodic payment for sinking fund Sample Case As a farsighted parent you are planning ahead for your children s education How much money must be invested each month to amass 10 000 in 10 years when inter...

Page 33: ... twenty years or b receive a lump sum of 13 500 now He assumes that inflation will erode the value of his money in either case so he is holding the inflation factor as an unavoidable constant He also assumes that money will be worth 4 75 on an annual basis From a financial standpoint only which alternative is better Solution Enter See Displayed 20 iii4 75 1000 l1li11__ present value 13500 x y 1 di...

Page 34: ...ecimal places except for some extreme cases Both price calculations are accurate to the sixth decimal place that s down to the last penny on 1 million Accuracy for yield problems is detailed in Appendix D Additional types of bond problems are described in Appendix C Bond Price This calculation finds the exact price of a bond based on the actual number of days when the purchase date maturity date e...

Page 35: ...e one that triggers the result is pressed The information is entered as follows CD Enter number of days if none el1fer 0 press SAVE Enter 30 days mo press o Enter number of months if none enter 0 press o Enter 12 mo yr press Enter number of years if none enter 0 press Enter 365 press X o Enter effective yield to maturity press BOND Enter coupon rate pressIII iiito obtain price Press 6 to obtain re...

Page 36: ...ty of a bond purchased Janu ary 23 1973 at a price of 106 that matures March 6 1978 and has a coupon rate of 4Y2 Solution Enter See Displayed 1 231973 AVEt 3 061978 YTM 4 51i11110611 81 _ effective annual yield to maturity The following calculation finds the yield to maturity of a bond when prices are obtained from the basis book or when prices are computed in a manner compatible with basis book c...

Page 37: ...la uses the constant storage location tr erefore any value stored there will be destroyed when the final key the one that triggers the result is pressed Information is entered as follows CD Enter beginning year number e g year 1 press Enter depreciable life of asset in years press Enter present value of asset press II COMPUTE o Press then press to obtain beginning year s depreciation Press to obta...

Page 38: ...0011 11_ _ year I depreciation J l _ remaining value x y II year 2 depreciation x y _ remaining value Sample Case 2 Using the values from Sample Case 1 what is the de preciation and depreciable value for years 3 through 6 Solution Enter COMPUTE See Displayed 3 6 210011 11_ _ year3 depreciation x y _ remaining value x y II J _ year 4 depreciation x y _ remaining value x y II c _ year 5 depreciation...

Page 39: ...years If you are using the double declining balance method what is the amount of depreciation and book value for years 1 4 See Displayed L i jl I _ multiplier _ lst year depreciation l l remaining book value l _2nd year depreciation 1 1 _remaining book value _3rd year depreciation 1 1 _remaining book value _4th year depreciation r 1 _remaining book value Note that an asset cannot be depreciated be...

Page 40: ...negative by pressing CHS if you re still putting money out press II ef Press to obtain the current net present value the first cash flow less capital outlay Enter second cash flow press II CD Press to obtain the current net present value the first and second cash flows less capital outlay Continue steps and CD until you run out of cash flows Notice the advantage of being able to tell in which peri...

Page 41: ...tant storage lo cation therefore any value stored there will be destroyed when the final key the one that triggers the result is pressed The information is entered as follows CD Enter number of installments press iii o Enter amount of each installment press III Enter principal press II Press to obtain rate of interest per installment Enter number of installments per year press X to obtain effec ti...

Page 42: ...al of IS00 Solution Enter See Displayed 18 S _ _ annual percentage rate x y _ monthly payment factor 0 059722 if shown with 6 decimal places IS00 X _ _monthly payment amount Accrued Interest This calculation finds the amount of accrued interest on both a 360 and 36S day basis when the number of periods days only in this ap plication interest rate and principal present value are known The formula u...

Page 43: ...red as follows j Enter the number of days press Enter the annual interest rate press Enter the face value future value press III IN o Press then IIIto obtain the discount amount on a 360 day basis Press Press 0 Press basis R to obtain the effective annual yield on a 360 day basis again to obtain discount amount on a 365 day basis again to obtain the effective annual yield on a 365 day Sample Case ...

Page 44: ...er from the actual amount as calculated on the HP 80 The known values are the payment numbers corresponding to the beginning and end of the time frame being analyzed the total number of loan payments interest rate per payment and amount of each pay ment just the principal and interest exclusive of any insurance or tax amounts The formula uses the constant storage location therefore any value store...

Page 45: ...order Sample Case You have a 30 year 8 mortgage on your house in the amount of 40 885 which you obtained 1 year ago Monthly payments are 300 What is the amount of interest paid during the taxable year just ended starting at payment 1 and ending at payment 12 What is the unpaid principal Solution Enter o STO 12 360 See Displayed 8 SAVE 12 3001ll _ interest paid during applicable period x y remainin...

Page 46: ... principal Solution Enter TE See Displayed 25113011180 B _ interest for payment 25 X _ unearned interest rebate 39 33 SAVE for payment 26 30 _ _ amount of principal outstanding after payment 25 Merchandising Purchasing Cost and Price Markup Chain Discounts Among the most used business calculations are those related to estab lishing retail prices based upon costs trade discounts and profit mar gins...

Page 47: ...t if paid within 10 days Otherwise the net amount of invoice is due in 30 days Another type of discount is termed an ticipation where the buyer is entitled to the 2 discount plus an additional discount of a percentage of the invoice balance if paid within 60 days This calculation finds the standard and anticipated discounts and the net invoice amount when discount rates terms amount of invoice and...

Page 48: ...g new data or correcting data entry errors In addition the number of entries and sum of the squares can be obtained Information is entered as follows CLEAR CD Press CLX to assure the HP 80 is clear of previous data o Key in values successively until al are entered press after each en try To correct an incorrect value before it is loaded with the keystroke press CLX After the value is loaded correc...

Page 49: ...R again Go to step above Sample Case 1 In a recent survey to determine the average age of the 10 wealthiest people in the U S the following data were obtained 62 84 47 58 68 60 62 59 71 73 Of the ages given what is the mean the standard deviation Solution Enter CLEAR CLX 62 84 47 58 68 See Displayed 60 62 59 71 73 _ _ sum of numbers II _ mean X Y _ standard deviation Add two more ages 87 and 49 af...

Page 50: ... squares number of entries Linear Regression Trend Line Analysis Linear regression techniques are used typically for projecting events based upon an extrapolation from a known trend The formula uses the constant storage location therefore any value stored there will be destroyed when the final key the one that triggers the result is pressed Input data must be evenly spaced and in chronological seq...

Page 51: ...at any time by pressing x y key be sure to press x y again before resuming Note 2 The slope change in units of quantity per time period of the trend line may be found by pressing R Sample Case Sales figures for a six month period are Month 1 2 3 4 5 6 Sales in thousands 476 589 570 625 619 570 Generate a linear trend forecast of the second six months sales level based on the first six months sales...

Page 52: ...nth 12 If this trend continues as projected what will be the percent growth for the year Enter a See Displayed 513 33 SAVE 724 19 _ _ growth for year ic j Ji i e j Ji Actual Sales 1st Six Months r 600 400 0 L 76 L IO L 71 2 Month 1000 800 600 400 200 Trend Liye r 6 Month Pro ecled Sales 10 12 Figure 4 Example of Trend Line Analysis 50 ...

Page 53: ... converted press SAV E Q Enter exchange rate press to obtain equivalent amount of foreign currency Sample Case If the rate of exchange is 2 4010 what is 30 20 worth in English currency Solution Enter 30 20 11 4 Foreign Io U S Currency Conversion rounded to 4 decimal places This calculation finds the value of a foreign currency in terms of U S dollars when the prevailing foreign to U S currency exc...

Page 54: ...To avoid confusion between the name of a location and its con tents the location is designated by a capital letter and the con tents by a small letter Thus x y z and t are the contents of X Y Z and T Operational Stack Contents Location Name t T z Z y Y X X NOTE The contents of the X location are always dis played When you key in a number it goes into the X location the only location displayed When...

Page 55: ...ormation in X Y Z and T after the key stroke T Z 12 12 Y 3 3 12 5 5 12 X 3 3 4 12 5 5 6 30 42 KEY 0 0 0 0 STEP D 0 0 0 J Step Remarks CD 3 is in display X 3 is duplicated into Y 0 4 is in display X 0 Contents of X and Yare multiplied result 12 is loaded into X 0 Automatic SAV E pushes 12 into Y when 5 is keyed in display shows 5 SAVE pushes 12 into Z 5 into Y and leaves X unchanged J 6 in display ...

Page 56: ...2 SAV E 3 SAVE 4 The stack now contains x 4 Y 3 Z 2 and t 1 To review the contents of the stack press R four times The fourth R returns the stack to its original position x 4 Y 3 Z 2 and t 1 The X Y key exchanges x and y as shown below Press Contents I Location t T x y Z z y x y X X You will often find that x and y should be exchanged before a or III operation Example Find 29 Press See Remarks 9 9...

Page 57: ... press that number twice Merely enter the number save it and press to double or x to square the number For example to double 3 Enter See Displayed l l _ 3 doubled The following illustrates the data flow in the stack Press See Remarks 3 3 3 is keyed into X SAVE 3 00 3 is loaded into X and Y 6 00 Contents of X and Yare added result 6 is loaded into X To square 3 Enter See Displayed _ 3 squared Again...

Page 58: ...ed then contents are destroyed result 10 is loaded into X 8 8 is keyed and loaded into X 10 is loaded into Y 18 00 Contents of X 8 and Y 10 are added then contents are destroyed result 18 is loaded into X 10 10 is keyed and loaded into X 18 is loaded into Y 28 00 Contents of X 10 and Y 18 are added then contents are destroyed result 28 is loaded into X Chained Calculation Chained calculations can ...

Page 59: ...aded into Z 2 67 is keyed in and loaded into X previous contents 8 are destroyed Contents of X 2 67 and Y 8 are multiplied then contents are destroyed result 21 36 is loaded into X 18 96 is dropped from Z to Y 40 32 Contents of X 21 36 and Y 18 96 are added then contents are destroyed result 40 32 is loaded into X 16 16 is keyed into X 40 32 is loaded into Y 16 00 16 is loaded into X and Y 40 32 i...

Page 60: ...ed into X and Y 5 5 5 is keyed and loaded into X previous contents 12 are destroyed X 60 00 Contents of X 5 and Y 12 are multiplied then contents are destroyed result 60 is loaded into X 2 2 2 is keyed and loaded into X 60 is loaded into Y 58 00 Contents of X 2 are subtracted from contents of Y 60 then contents are destroyed result 58 is loaded into X 8 8 8 is keyed into X 58 is loaded into Y SAV ...

Page 61: ...stroyed X 1065 40 Contents of X 5 and Y 213 08 are multiplied then contents are destroyed resu lt 1065 40 is loaded into X contents of Z 72 are dropped to Y 1 33 1 33 1 33 is keyed and loaded into X 1065 40 is loaded into Y 72 is loaded into Z 801 05 Contents of Y 1065 40 are divided by contents of X 1 33 then contents are destroyed result 801 05 is loaded into X contents of Z 72 are dropped to Y ...

Page 62: ...ed to principal computed for elapsed months and days on a 360 day year basis In this computation a month is considered to be 1 12th of 360 days or 30 days and each period from a date in one month to the same date in the following month shall be considered to be 30 days In the calculation the first day of the accrual period should be counted and the last or settlement date omitted The number of ela...

Page 63: ...ble Bonds Some bonds are redeemed prior to their stated maturity date and in most cases an incentive is provided for the holder of such bonds This incentive is known as a call premium it is merely a sum of money to be paid in the future if the bond is called The general procedure for determining a callable value is as follows CD Determine bond price as usual Find the present value of the premium o...

Page 64: ...ounded to six decimal places 108 831895 To summarize BOND 7 SAVE 365 x 112 4 3 25111 STO 7 SAVE 2 x 11 _ _ bond price 112 4 SAVE 2 41111 present value of premium RCL 11 callable bond price percerltage 01 price extended Yield to Call Calculations to 6 decimal places Effective annual yield to call calculations are made in the same manner as yield to maturity calculations except that the annual coupo...

Page 65: ...ss RC CD Key in 1 04 call price la par ralio press II Press to obtain yield 2 40 To summarize 108 831895sTo 7 SAVE 365 x g3 25 SAVE YTM 1 04 III RC 1 04 II B _ yield to call Bond Amortization Amortization of a bond premium is the gradual writing down of a bond investment until it reaches its face value at maturity Conversely for a discount bond the value is gradually written up until it reaches fa...

Page 66: ...ey in 3 19 computed YTM press Key in 4 coupon presslll BOND Press IIto obtain the amortized value 106 24 Press 0 to obtain answer rounded to six decimal places 106 241026 To summarize 10 SAVE 12 9 365 x 4111 YT 106 75 11 1 yield to maturity 11 SAVE 12 8 365 X 3 19 BOND 4111 11 amortized value 0 II II II value extended to Implications of Increased Precision on Bond Calculations 6 decimal places The...

Page 67: ...ctuaL price using the effective yield of 8 00 just calculated CD Key in 1 031973 settlement date press AVE o Key in 10 151973 maturity date press II i Key in 8 00 calculated yield press o Key in 4 annual coupon rate press III BONO Press to obtain actual price 97 02 To summarize 12 SAVE 30 9 12 365 X 4l1li YTM 97 010 _ _ yield by conven tional method 1 031973 SAVE 10 151973 II8 4l1li BOND actual pr...

Page 68: ...ution First determine what your after tax proceeds on the bond will be after the 5 years Capital gains 90 70 20 Tax on capital gains 25 of 20 5 Thus net proceeds from bond 90 5 85 Now simply solve for yield using 85 85 100 as the net price to par ratio as follows D Key in 70 purchase price press STO Key in 11 011972 purchase date press SAVE Key 11 011977 assumed sell date press III o Key in 3 annu...

Page 69: ...e ratio PV PMT x n or FV PMT x n Ex treme cases outside those normally encountered may require minutes Range Financial calculations using the top row of keys are not permitted for interest rate values very close or equal to 0 specifically rates between i 0 0000001 and i 0 0000001 are not handled Error Indicators Range Errors Any computation or data entry resulting in a magnitude greater than or eq...

Page 70: ...is correct internally and the number in the display may be used in a normal manner for further calculations How ever if you wish you can produce the correct display before proceeding Environmental Considerations Mode Temperature C Temperature of Operating O C to 50 C 32 F to 122 F Charging 10 C to 40 C 50 F to 104 F Storage 40 C to 55 C 40 F to 131 F Battery Operation Use only the HP Rechargeable ...

Page 71: ...uced battery operating time For convenience overnight charging is recommended CAUTION To prevent damage to the calculator the position of the line voltage select switch on the battery charger must be set to the proper line Voltage CD Turn the HP 80 power switch to OFF Insert battery charger plug into the rear connector of the HP 80 and insert power plug of battery charger into the power outlet The...

Page 72: ...t Packard according to the instructions on page 74 If the battery pack is out of warranty use the Accessory Order Card provided with your HP 80 to order a new battery pack Remember you can use your UP SO on ac power until the replacement battery pack arrives Battery Pack Replacement 1 Turn power switch to OFF and disconnect the battery charger 2 Slide the two battery door latches the top feet towa...

Page 73: ...rd 6 Insert the bottom of the battery door behind the retaining groove and close the door NOTE If you use your HP 80 extensively in field work or during travel you may want to order the Model 82004A Battery Holder and Pack consisting of battery charging attachment and spare battery pac k This enables you to charge one pack while using the other I CAUTION Do not try to burn old batteries They may E...

Page 74: ...ed to our product line Standard Accessories HP 80 Quick Reference Guide Battery Pack Battery Charger AC Adapter HP 80 Deluxe Travel Safety Case Soft Carrying Case HP 80 Owner s Handbook Personalizing Labels 4 each Optional Accessories Battery Holder and Pack Security Cradle Hard Leather Field Case 72 ModeJ Part No 00080 90003 82001A 82002A 82014A 82012A 00080 90001 7120 2946 Model Part No 82004A 8...

Page 75: ...80 from the ac line 4 If display is still blank the HP 80 is defective see warranty section Warranty In Warranty The HP 80 is warranted against defects in materials and workmanship for one year from date of delivery During the warranty period we will repair or replace components that prove to be defective provided they are returned to Hewlett Packard according to instructions see Ship ping Instruc...

Page 76: ...nd within warranty return the following to us Only the defective battery pack A completed Service Card from back cover pocket of this manual Send returned items safely packaged to the address shown on the Service Card Under normal conditions your calculator will be repaired and re shipped within two days of receipt at this address Should other prob lems or questions arise regarding service please ...

Page 77: ...incipal FV future value I interest amount Savings FV PMT 1 i 1 J Add on Interest Rate to Annual Percentage Rate r decimal Add on rate n _ 1 1 i n n 1 12 r APR 1200i Where i is the solution for the above equation Bond Calculations n total number of days between purchase and maturity INTR decimal coupon rate on annual basis YTM annual yield to maturity in decimal Bond bond price If n 182 5 Bond 200 ...

Page 78: ...est paid between payment j to payment k IH PMT k j 1 i k T1 1 i i Remaining balance to be paid at payment k k 1 2 3 PVk P T I 1 i Rebate Rule of 78 s PV finance charge I interest charged at month k Sum of Digits Depreciation Rebate 2 n k l pv n n 1 n k I 2 Dk depreciation at k k 1 2 3 D _ 2 n k 1 I n n 1 BV book value at k Percentage Rate Percentage base X100 Percent Difference 6 New Amount Base 1...

Page 79: ...interest n total number of days i deCimal interest on annual basis D discount amount Yield decimal effective interest on discounted note n Cr o 360 PV I Discounted notes n D 360 360 FV Yield r o D lfio X 36000 n FV D Go Trend Line S slope Yo intercept at time zero k time periods k 1 2 3 y value at time k N total number of data points 77 360 D D lfio X 365 Yield Yield o X ...

Page 80: ... Y S k Yo Statistics Sum summation of data SS summation of data squared x mean a standard deviation of a sample x entry value Summation N sum L x i l Mean N _ 1 x NL J x i Standard deviation 1 2 N a N IL x Nx i l 78 ...

Page 81: ...and often under seal Bond Price The price an investor is willing to pay for a bond In volved is the determination of a value based on the redemptioIi price of a bond when held to maturity or earlier date the nominal or coupon rate of interest and the effective rate or desired yield Bond Yield The effective annual rate of return to an investor when a bond is bought at a given price pays a nominal o...

Page 82: ...ase is then estab lished by subtracting the remaining portion of the loan payment amount that was not designated as interest Discount The difference between the worth of a future benefit and its present value Discounted Cash Flow A cash flow occurring some time in the future which has been discounted by a given discount factor on a com pounded basis the present value of a future cash flow Discount...

Page 83: ...m of two or more quan tities by the number of items usually denoted by a symbol such as x Also referred to as the arithmetic average or arithmetic mean Mortgage A lien on land buildings machinery equipment and other property fixed or movable given by a borrower to the lender as security for his loan N Nominal Rate A stated rate which is usually subdivided for com pounding purposes resulting in a h...

Page 84: ...izatioll s Settlement Date The date on which payment usually for a security is settled Simple Interest The charge for the loan of money or for a deferment of the collection of an account computed by applying a rate of interest against the amount of the loan or account Contrasts with compound interest in that only the principal earns interest for the entire life of the transaction Sinking Fund Cash...

Page 85: ...ive annual yield resulting from an investment in a callable bond to be held until an assumed call date and call price Yield to maturity The effective annual yield resulting from an invest ment in a bond to be held until maturity and redeemable at par 83 ...

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Page 87: ...HP 80 Owner s Handbook ...

Page 88: ...arranty period Hewlett Packard will repair or at its option replace at no charge components that prove to be defective provided the calculator is returned shipping pre paid to Hewlett Packard s Customer Service facility This warranty does not apply if the calculator has been damaged by accident or misuse or as a result of service or modification by other than an authorized Hewlett Packard Customer...

Page 89: ...eted and returned with your Calculator or Battery Pack Owner s Name Street Address City State Zip Date Serial No Model No Was your calculator received defective Yes D No D Describe problem ____________ HEWLETTSPACKARD 9320 0528 Rev 3173 ...

Page 90: ...your shipment Send returned items safely packaged to HEWLETT PACKARD CO W120 Century Road Paramus NJ 07652 Phone 201 265 5000 HEWLETT PACKARD CO 5500 W Howard Street Skokie IL 60076 Phone 312 677 0400 HEWLETT PACKARD CO 333 Logue Avenue Mt View CA 94040 Phone 415 968 9200 HEWLETT PACKARD CO P O Box 28234 Atlanta GA 30328 Phone 404 436 6181 HEWLETT PACKARD CO 201 E Arapaho Road Richardson TX 75080 ...

Page 91: ...00 Wolfe Road P O Box 3500 Cupertino California 95014 Offices in principal cities throughout the U S For Additional Sales and Service Information Con tact Your Local Hewlett Packard Sales Office or Call 408 996 0100 Ask for Calculator Customer Service 00080 90001 Rev 4 73 Printed in U S A ...

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